Search for dissertations about: "Thermally grown oxide"

Showing result 1 - 5 of 15 swedish dissertations containing the words Thermally grown oxide.

2. 1. Electrical Characterization of Metal-Oxide-Silicon Structures with Ultra Thin Oxide Layers

   Author : Per Lundgren; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tunneling; MTOS; oxide defects; MOS; PMA;

   Abstract : Metal-oxide-semiconductor (MOS) structures with very thin (2 - 4 nm) oxide layers thermally grown on silicon have been electrically characterized regarding oxide and interface defects and concerning the direct tunnel current through the oxide. This thesis comprises eight papers which deal with the appearance of oxide charge during electrical stress (papers A, D, E), the beneficial effect on the defect density of low-temperature (up to 350 °C) post-metallization annealing (PMA) (paper A, B, C, G), and the effect of temperature and choice of metal for the tunnel current (paper F, H). READ MORE

4. 2. Ultrathin Oxides in Metal-Oxide-Silicon Structures: Defects and Characterization

   Author : Lars-Åke Ragnarsson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PMA; interface state densities; silicon; aluminum oxide; Pb; ultrathin; RPECVD; MOS;

   Abstract : The properties of metal-oxide-silicon (MOS) structures with ultrathin oxide layers (15-30 Å) have been investigated by means of electrical characterization. The characterization methods used were mainly capacitance voltage (C-V), current voltage (I-V) and constant voltage stress (I-t) measurements. READ MORE

5. 3. Design of Thermal Barrier Coatings : A modelling approach

   Author : Mohit Kumar Gupta; Per Nylén; Nicolaie Markocsan; Christer Persson; Lech Pawlowski; Högskolan Väst; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermal barrier coatings; Microstructure; Thermal conductivity; Young’s modulus; Interface roughness; Thermally grown oxide; Lifetime; Finite element modelling; Design; Manufacturing and materials engineering; Produktions- och materialteknik;

   Abstract : Atmospheric plasma sprayed (APS) thermal barrier coatings (TBCs) are commonly used for thermal protection of components in modern gas turbine application such as power generation, marine and aero engines. TBC is a duplex material system consisting of an insulating ceramic topcoat layer and an intermetallic bondcoat layer. READ MORE

6. 4. Micromechanics of oxides - From complex scales to single crystals

   Author : Anand Harihara Subramonia Iyer; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cr2O3; oxide scales; micromechanical testing; fracture; electron microscopy;

   Abstract : Protective oxide scales shield high temperature materials from corrosion, thus ensuring safety and long material life under adverse operating conditions. Cracking and spallation of such scales can lead to fatigue crack initiation and expose the material to further oxidation. READ MORE

7. 5. Corrosion of Ferritic Stainless Steels Used in Solid Oxide Fuel Cells

   Author : Claudia Goebel; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SOFC; Corrosion; Dual Atmosphere; Interconnect; Area Specific Resistance;

   Abstract : Solid oxide fuel cells (SOFC) are energy conversion systems with clean emissions (depending on the fuel used) and high electrical efficiencies, which could potentially replace conventional conversion systems such as combustion engines. However, other issues, such as high costs and limited lifetime, must be resolved before widespread commercialization of SOFCs can be achieved. READ MORE